/Engine/Source/Editor/PropertyEditor/Public/IPropertyRowGenerator.h
The list of root tree nodes that have been generated. Note: There will only be one root node unlessFPropertyRowGeneratorArgs.bAllowMultipleTopLevelObjectswas set to true when the generator was created
const [TArray](API\Runtime\Core\Containers\TArray)< [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [IDetailTreeNode](API\Editor\PropertyEditor\IDetailTreeNode) > > & GetRootTreeNodes() const